# A CHART OF CONSANGUINITY

Helps to identify the relationship of those with a common ancestor.

O F GF GGF 3GF 4GF 5GF
F S N GN 2GN 3GN 4GN
GF N 1C 1C
1R
1C
2R
1C
3R
1C
4R
GGF GN 1C
1R
2C 2C
1R
2C
2R
2C
3R
3GF 2GN 1C
2R
2C
1R
3C 3C
1R
3C
2R
4GF 3GN 1C
3R
2C
2R
3C
1R
4C 4C
1R
5GF 4GN 1C
4R
2C
3R
3C
2R
4C
1R
5C
 C = Cousin F = Father G = Great/Grand N = Nephew/Niece O = Original Ancestor R = Removed S = Sibling Examples: 1C = First Cousin GGF = Great Grand Father 2C1R = Second Cousin, Once Removed GN = Grand Nephew/Niece

Locate one person along the top row, according to his relationship to the Original Ancestor. Locate the other person along the left hand column, according to his relationship to the same Original Ancestor and where the two lines cross indicates the relationship of the two people to each other.
If my Grandfather (GF) is also your Grandfather (GF), then you and I are first cousins (1C).

My Great Grand Mother's brother is my Great Grand Uncle (and I'm his GGN). Our Original Ancestor is his Father (F), who is also my Great Great Grand Father (GGGF).

Be sure to use the nearest Original Ancestor or you can come up with such ridiculous things as: Since my Grand-Father (GF) is my son's Great-Grandfather (GGF), therefore my Son is my First Cousin, once removed (1C1R).
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